Ask spender to apply the aufs patch in his pre-built grsec kernels

Originally created by @intrigeri on #8606 (Redmine)

aufs patches applied to current testing/sid kernel (20150108): http://sources.debian.net/src/linux/3.16.7-ckt2-1/debian/patches/features/all/aufs3/

Parent Task: #7649 (closed)